Milk: Protein content of cows' milk
Description
The Milk
data frame has 1337 rows and 4 columns.Format
This data frame contains the following columns:
- protein
-
a numeric vector giving the protein content of the milk.
- Time
-
a numeric vector giving the time since calving (weeks).
- Cow
-
an ordered factor giving a unique identifier for each cow.
- Diet
-
a factor with levels
barley
,
barley+lupins
, and
lupins
identifying the diet for each cow.
Details
Diggle, Liang, and Zeger (1994) describe data on the protein content
of cows' milk in the weeks following calving. The cattle are grouped
according to whether they are fed a diet with barley alone, with
barley and lupins, or with lupins alone.